Single centre point is usually the most accurate with sports, maybe with left/right expansion for faster moving sports. For Judo you could use manual focusing at a present point depending on your depth of field requirements.
Remember to watch your white balance with the artifical lighting indoors and the competitors presumably wearing white and to use a nice fast lens - something like an 85mm/f1.4.

Single centre point is usually the most accurate with sports, maybe with left/right expansion for faster moving sports. For Judo you could use manual focusing at a present point depending on your depth of field requirements.

Remember to watch your white balance with the artifical lighting indoors and the competitors presumably wearing white and to use a nice fast lens - something like an 85mm/f1.4.

I have been having focus issues with single area so was planing to set continuous focus with Dynamic/group/dynamic-closest but cant make my mind up which would be best. The light is really bad and even with 2.8 glass a flash is needed but focus has been the main issue.

I have been having focus issues with single area so was planing to set continuous focus with Dynamic/group/dynamic-closest but cant make my mind up which would be best. The light is really bad and even with 2.8 glass a flash is needed but focus has been the main issue.

OK - always knew I should stick with things that dont move :D
So, if single point is the way to go - I take it, it will be best to use continuous focus or not - also when would the other modes be best used.
I'm doing some portrait stuff tomorrow for my neice and think I will get the kids running round about to get some practice in whilst I am there.

OK - always knew I should stick with things that dont move

So, if single point is the way to go - I take it, it will be best to use continuous focus or not - also when would the other modes be best used.

I'm doing some portrait stuff tomorrow for my neice and think I will get the kids running round about to get some practice in whilst I am there.

Single point is generally used because it allows the photographer more control over the focal point. I would use continuous focus with it as the camera is likely to be faster than you at keeping the precise focal point you've selected, but does mean you have to keep the focal point on the subject as they move. There's a discussion [link=http://www.flickr.com/groups/d200/discuss/72157604816542086/]here[/link] on which AF mode to use on a d300 for martial arts, so you're not alone in this and there might be some tips there you can use.

Single point is generally used because it allows the photographer more control over the focal point. I would use continuous focus with it as the camera is likely to be faster than you at keeping the precise focal point you've selected, but does mean you have to keep the focal point on the subject as they move. There's a discussion here on which AF mode to use on a d300 for martial arts, so you're not alone in this and there might be some tips there you can use.

Thanks for that. Been driving me mad but I have to say I have learnt a lot researching this issue.
I think my set up will be
1. Continuous Focus
2. Single area.
3. Custom a1 set to focus.
As the lighting is beyond lens only use even with the iso cranked up I will have to use flash which is ok.

Thanks for that. Been driving me mad but I have to say I have learnt a lot researching this issue.

I think my set up will be

1. Continuous Focus
2. Single area.
3. Custom a1 set to focus.

As the lighting is beyond lens only use even with the iso cranked up I will have to use flash which is ok.